1) IF Ripple would become as big as Bitcoin (marketcap, tradingvolume, ...) then Ripple has a potential of minimum 6$. --> I think it's possible because it's centralised and has lots of official support.
2) IF Coinbase ads Ripple in the beginning of 2018, the price will rise enormously
3) IF Ripple anounces a new partnership in the following days, the price will rise enormously
Conclusion: Ripple will rise in the following days. (With ups and downs). Buy in a dip, sell at the top.
My strategy: Go long, buy, HODL
Disclaimer:
This is not financial advise, but a part of my strategy I want to share.
Remember: Everything that goes up comes back down and everything that goes down will come up again (at least in cryptocurrency ;) )